Audio Sliders
Volume Control replacement that is five times smaller than its Windows counterpart.
16 Alternatives To Audio Sliders
3RVX
3RVX is a skinnable volume display and controller.
7+ Taskbar Tweaker
7+ Taskbar Tweaker allows you to configure various aspects of the Windows taskbar.
Background Music
Control the audio on your Mac apps from the menu bar
EarTrumpet
Volume Control for Windows
Jukedeck
Create unique music for your videos in seconds.
Power mixer
Power Mixer is a complete Windows volume control replacement.
QasMixer
QasMixer is a desktop mixer application for ALSA’s “Simple Mixer Interface”.
Sound Control
App-specific volume control
Sound Lock
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Volti
Volti is an GTK+ application for controlling audio volume from system tray/notification area.
Volume Icon
Volume Icon aims to be a lightweight volume control that sits in your systray.
Volume Scroll
Volume Scroll lets you control your main volume by hovering with your mouse cursor over the top…
Volumouse
From authors website:
Volwheel
VolWheel is a little application which lets you control the sound volume easily through a tray icon…
X-Mouse Button Control
XMouse Button Control (XMBC) allows you to create application and window specific profiles.